simplify configureIntGmpArguments based on idea provided by Gabor Greif
simplify configureIntGmpArguments based on idea provided by Gabor Greif

sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,bgamari/shaking-up-ghc,snowleopard/shaking-up-ghc,snowleopard/hadrian,izgzhen/hadrian,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc